EP1058026A2 - Rolling-lobe air spring - Google Patents

Rolling-lobe air spring Download PDF

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Publication number
EP1058026A2
EP1058026A2 EP00110758A EP00110758A EP1058026A2 EP 1058026 A2 EP1058026 A2 EP 1058026A2 EP 00110758 A EP00110758 A EP 00110758A EP 00110758 A EP00110758 A EP 00110758A EP 1058026 A2 EP1058026 A2 EP 1058026A2
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EP
European Patent Office
Prior art keywords
bellows
bead
piston
rolling
air spring
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP00110758A
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German (de)
French (fr)
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EP1058026A3 (en
EP1058026B1 (en
Inventor
Detlef Wenzel
Manfred Degenhardt
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ContiTech Luftfedersysteme GmbH
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ContiTech Luftfedersysteme GmbH
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Publication of EP1058026A2 publication Critical patent/EP1058026A2/en
Publication of EP1058026A3 publication Critical patent/EP1058026A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
    • F16F9/0454—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall characterised by the assembling method or by the mounting arrangement, e.g. mounting of the membrane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
    • F16F9/05—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/40—Constructional features of dampers and/or springs
    • B60G2206/42—Springs
    • B60G2206/424—Plunger or top retainer construction for bellows or rolling lobe type air springs

Definitions

  • the invention relates to a bellows air spring according to the Preamble of claim 1.
  • Air springs such as those used in vehicle construction for cushioning wheel suspensions, essentially consist of a rolling bellows (air bellows), which is delimited on the one hand by a cover plate (cone plate) and on the other hand by a rolling piston, thus enclosing an air spring volume in its interior.
  • the bellows itself is made of rubber or rubber-like plastic with end fastening beads, such as. B. described in DE-OS 29 05 791.
  • the end of the bellows on the cover plate is usually attached by flanging, which is why the (top) cover plate is also called “flare plate”.
  • the lower edge of the rolling bellows ie the lower bead section, is usually designed as a cone provided with sealing grooves, in order then to be screwed to a multi-part rolling piston provided with a tensioning plate.
  • EP 0 546 385 B1 includes an air bellows a braced sealing bead shown by a flanged edge of a flanged plate upper fastening part is wrapped and tightly clamped.
  • air springs are known, which also end of the rolling bellows facing the rolling piston Flanging is attached.
  • DE-PS 10 39 375 is the lower bead of the air spring bellows with that of the rolling piston firmly connected.
  • the coaxial with the bellows, cylindrical rolling piston runs in a flanged Edge that grips around the bead and this against the Ring edge of a lid presses. This lid is used close the guide body and opposite the roller bellows complete.
  • the flanged edge is around the bead of the Roll bellows laid around.
  • the piston part consists of one piece trained molded body and is by flanging with the Rollbalg connected in that the outer peripheral wall of the Roll-off piston for fastening the facing bellows end is flanged inwards.
  • the corresponding bellows has one from the flanged edge encircled bead-like ring set, which with a Reinforcement insert is provided.
  • the following catalog of requirements has been drawn up to overcome the above-mentioned problems when fastening the bellows to the open rolling piston by flanging:
  • the special design of the bulb-side bead must be such that, during the flanging, the flanged edge contacts the bellows as late as possible in order to prevent the bead from escaping downwards into the free space.
  • the flared gap must already be closed to such an extent that the bead can no longer slip out.
  • the bead must immediately clamp against the inner surface of the contact wall when gripping.
  • the object of the present invention is, based on the prior art available with the Gbm 298 08 109 U1, to design the piston-end bellows in such a way that it can be securely flanged even when the piston is open at the end.
  • the bulb-side bead of the bellows is formed at 45 ° to the horizontal ao, that there are no undercuts on the vulcanization mold or on the product itself, there are no molding and molding difficulties.
  • the bead is thus so dimensionally stable that a rolling piston can then be flanged with it. Bead formations with sealing surface inclinations between 45 ° and 65 ° have proven to be particularly advantageous. Due to the inward flaring process, the bead swings into a 90 ° position to the horizontal.
  • the reduction in diameter in the lower area of the bellows is only to favor the formation of the roll fold necessary when operating the air bellows.
  • Diameter of the bead core and the diameter of the Piston wall coordinated.
  • the bellows air spring 2 shown in FIG. 1 exists essentially from a flexible rubber bellows 4 or rubber-like plastic, a cover plate 6 and a rolling piston 8. At both ends is the Roll bellows 4 each provided with a bead 10, 12.
  • the "Upper" bead 10 is by crimping with the cover plate (Flare plate) 6 connected during the bulb-side bead 12 attached to a flanged edge 30 of the rolling piston 8 is.
  • cover plate 6 and 8 rolling piston Bellows encloses the air spring interior 28.
  • Figs. 2a-c Essential details of the bellows air spring according to the invention are shown in Figs. 2a-c.
  • the in Fig. 2a has bellows 4 shown on one side in longitudinal section bulges at both ends.
  • the upper bead 10 is formed in a conventional manner and is used to attach the bellows 4 to the cover plate (Flaring plate) 6.
  • the lower one, for attachment to the Roll piston 8 provided roll bellows bead 12 is invention-specific to the flange 30 of the open top Rolling piston 8 adapted.
  • the piston shown in Fig. 3 8 shows a cylindrical piston rim 30. This is the condition before beading 12.
  • the bead-shaped thickening of the end of the roll bellows has a sealing surface 14.
  • the bulb-side bead 12 has a bead core (ring body) 24 made of steel or steel wire.
  • the diameter 22 of the bead 12 in the piston area is matched to the diameter 26 of the piston wall.
  • the bead 12 of the rolling bellows 4 does not hook into a pre-flanged piston rim 30.
  • the piston rim 30 is not pre-flanged.
  • the edge 30 is initially cylindrical; it closes only by the flaring process around the bead 12 of the bellows 4.
  • the bead 12 is tightly enclosed by the flanged edge 30 of the rolling piston 8, the piston-side sealing surface 14 of the rolling bellows 4 being at 90 °, based on the "horizontal ", is rotated so that it rests over the entire surface at the upper end of the piston wall (FIG. 2c).
  • the piston rim 30 is deflected inwards by a total of approximately 270 °. This flanging process is carried out with a special tool.
  • the outer surface of the rolling piston 8 is the diameter 22 of the bellows 4 in the bead area less than the other Bellows diameter 20.
  • shock absorber is to be integrated in the air spring 2, so it can be a separate part in the open piston 8th to be built in.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Diaphragms And Bellows (AREA)
  • Vehicle Body Suspensions (AREA)
  • Glass Compositions (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Joints Allowing Movement (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Clamps And Clips (AREA)
  • Sealing Devices (AREA)

Abstract

The cushion-type pneumatic spring consists of flexible airspring bellows, a cover plate and piston. The end of the airspring bellows facing the piston has a ridge (12) vulcanized on. The sealing surface (14) tilts at an angle to the vertical (18) on the bellows axis (16). The airspring bellows at the end facing the piston-side ridge has a smaller diameter (22) than the other airspring bellows diameter (20).

Description

Die Erfindung betrifft eine Rollbalg-Luftfeder gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a bellows air spring according to the Preamble of claim 1.

Luftfedern, wie sie im Fahrzeugbau zur Abfederung von Radaufhängungen Verwendung finden, bestehen im wesentlichen aus einem Rollbalg (Luftfederbalg), der endseitig einerseits von einer Abdeckplatte (Konusplatte) und andererseits von einem Abrollkolben begrenzt ist und so in seinem Innenraum ein Luftfedervolumen umschließt. Der Rollbalg selbst besteht aus Gummi oder gummiähnlichem Kunststoff mit endseitigen Befestigungswülsten, wie z. B. in der DE-OS 29 05 791 beschrieben.
Das an der Abdeckplatte befindliche Rollbalg-Ende wird üblicherweise durch Bördeln befestigt, weshalb die (obere) Abdeckplatte auch "Bördelplatte" genannt wird. Der untere Rand des Rollbalgs, d. h. die untere Wulstpartie wird üblicherweise als mit Dichtrillen versehener Konus ausgebildet, um dann - mit einem Spannteller versehen - an einen mehrteiligen Abrollkolben geschraubt zu werden.Air springs, such as those used in vehicle construction for cushioning wheel suspensions, essentially consist of a rolling bellows (air bellows), which is delimited on the one hand by a cover plate (cone plate) and on the other hand by a rolling piston, thus enclosing an air spring volume in its interior. The bellows itself is made of rubber or rubber-like plastic with end fastening beads, such as. B. described in DE-OS 29 05 791.
The end of the bellows on the cover plate is usually attached by flanging, which is why the (top) cover plate is also called "flare plate". The lower edge of the rolling bellows, ie the lower bead section, is usually designed as a cone provided with sealing grooves, in order then to be screwed to a multi-part rolling piston provided with a tensioning plate.

In der Fig. 1 der EP 0 546 385 B1 ist ein Luftfederbalg mit einem verspannbaren Dichtwulst dargestellt, der von einem umgebördelten Rand eines als Bördelplatte ausgebildeten oberen Befestigungsteiles umlaßt und dicht verspannt ist. 1 of EP 0 546 385 B1 includes an air bellows a braced sealing bead shown by a flanged edge of a flanged plate upper fastening part is wrapped and tightly clamped.

Darüberhinaus sind Luftfedern bekannt, bei denen auch das dem Abrollkolben zugewandte Ende des Rollbalges mittels Bördeln befestigt ist. Gemäß der DE-PS 10 39 375 ist der untere Wulst des Luftfeder-Balges mit dem des Abrollkolbens fest verbunden. Der zum Rollbalg gleichachsig angeordnete, zylinderförmige Abrollkolben läuft in einen umgebördelten Rand aus, der um den Wulst herumgreift und diesen gegen den Ringrand eines Deckels drückt. Dieser Deckel dient dazu, den Führungskörper zu schließen und gegenüber dem Rollbalg abzuschließen. Der umgebördelte Rand wird um den Wulst des Rollbalges herumgelegt.In addition, air springs are known, which also end of the rolling bellows facing the rolling piston Flanging is attached. According to DE-PS 10 39 375 is the lower bead of the air spring bellows with that of the rolling piston firmly connected. The coaxial with the bellows, cylindrical rolling piston runs in a flanged Edge that grips around the bead and this against the Ring edge of a lid presses. This lid is used close the guide body and opposite the roller bellows complete. The flanged edge is around the bead of the Roll bellows laid around.

Ohne solch einen auf dem Abrollkolben anzubringenden zusätzlichen Deckel bzw. Spannteller kommt der in dem Gebrauchsmuster DE 298 08 109 U1 beschriebene Abrollkolben aus. Dabei besteht der Kolbenteil aus einem einteilig ausgebildeten Formkörper und wird durch Bördeln mit dem Rollbalg dadurch verbunden, daß die äußere Umfangswand des Abrollkolbens zur Befestigung des dem .Abrollkolben zugewandten Balgendes einwärts umgebördelt ist. Das entsprechende Balgende weist einen vom Bördelrand umgriffenen wulstartigen Ringsatz auf, der mit einer Verstärkungseinlage versehen ist.Without such a to be attached to the rolling piston additional lid or clamping plate comes in the Utility model DE 298 08 109 U1 described rolling piston out. The piston part consists of one piece trained molded body and is by flanging with the Rollbalg connected in that the outer peripheral wall of the Roll-off piston for fastening the facing bellows end is flanged inwards. The corresponding bellows has one from the flanged edge encircled bead-like ring set, which with a Reinforcement insert is provided.

Praktische Versuche zur Herstellung derartiger Luftfedern haben gezeigt, daß Probleme bei der Befestigung des Rollbalges am offenen Kolben auftreten. Der in üblicher Weise angeformte Wulst eines Balges ist am offenen Abrollkolben nicht ohne weiteres einsetzbar. Bei einem Wulst an der oberen Abdeckplatte liegt die Dichtfläche waagerecht, um beim Bördeln gegen die obere Abdeckplatte angepreßt zu werden. Da der Abrollkolben aber keine stirnseitige Platte aufweist, die üblicherweise als Gegenhaltefläche dient, ist das von der waagerechten Abdeckplatte her bekannte Bördelungsprinzip nicht auf die Befestigung des unteren Rollbalgrandes übertragbar. Ein vorgeschlagenes Kippen des Wulstes um 90° ist auch nicht möglich, da der Rollbalg in einer Form hergestellt wird und der sich einstellende Hinterschnitt keine Entformung möglich macht (Fig. 4).Practical tests for the manufacture of such air springs have shown that problems with the attachment of the Roll bellows appear on the open piston. The one in the usual The bulge of a bellows is open Roll-off pistons cannot be used easily. At a Bead on the top cover plate is the sealing surface horizontally to flare against the top cover plate to be pressed. Since the rolling piston is none has end plate, which is usually called Counter surface, that is from the horizontal Cover plate ago known flanging principle not on the Attachment of the lower edge of the roller bellows transferable. On proposed tilting of the bead by 90 ° is also not possible because the bellows is made in a mold and the resulting undercut no demoulding makes possible (Fig. 4).

Zur überwindung der genannten Probleme bei der Befestigung des Rollbalgs am offenen Abrollkolben durch Bördeln wurde folgender Forderungekatalog aufgestellt:
Die besondere Ausbildung des kolbenseitigen Wulstes muß derart sein, daß beim Bördeln ein Kontakt der Bördelkante mit dem Balg so spät wie möglich erfolgt, um ein Ausweichen des Wulstes nach unten in den freien Raum zu vermeiden. Der Bördelspalt muß beim Eingreifen des Wulstes bereits so weit geschlossen sein, daß der Wulst nicht mehr herausrutschen kann. Der Wulst muß sich beim Erfassen gleich klemmend gegen die Innenfläche der Kontaktwand legen. Zusammengefaßt besteht die Aufgabe der vorliegenden Erfindung darin, ausgehend von dem mit dem Gbm 298 08 109 U1 vorliegenden Stand der Technik das kolbenseitige Balgende so zu gestalten, daß es auch bei einem stirnseitig offenen Kolben sicher bördelbar ist.The following catalog of requirements has been drawn up to overcome the above-mentioned problems when fastening the bellows to the open rolling piston by flanging:
The special design of the bulb-side bead must be such that, during the flanging, the flanged edge contacts the bellows as late as possible in order to prevent the bead from escaping downwards into the free space. When the bead engages, the flared gap must already be closed to such an extent that the bead can no longer slip out. The bead must immediately clamp against the inner surface of the contact wall when gripping. In summary, the object of the present invention is, based on the prior art available with the Gbm 298 08 109 U1, to design the piston-end bellows in such a way that it can be securely flanged even when the piston is open at the end.

Die Lösung dieser Aufgabe ist mit Anspruch 1 gegeben. Durch die erfindungsgemäße Ausgestaltung der kolbenseitigen Wulstpartie kann diese mit einem einteiligen Stahlblech-Abrollkolben ohne zusätzliche Befestigungsteile, wie z. B. Spannteller und dergleichen, verbördelt werden. Dies trägt zur Bauteilereduzierung des Gesamtsystems bei.This object is achieved with claim 1. By the inventive design of the piston side Bead section can be done with a one-piece sheet steel roll-off piston without additional fasteners, such as. B. Clamping plate and the like are crimped. This carries to reduce the number of components in the overall system.

Dadurch, daß der kolbenseitige Wulst des Rollbalgs unter 45° zur Waagerechten ao ausgebildet wird, daß weder an der Vulkanisationsform noch am Produkt selbst Hinterschneidungen vorhanden sind, gibt es keine Ein- und Ausformschwierigkeiten. Der Wulst ist somit so formstabil, daß anschließend ein Abrollkolben damit gebördelt werden kann.
Wulstausbildungen mit Dichtflächenneigungen zwischen 45° und 65° haben sich als besonders vorteilhaft erwiesen. Durch den einwärts gerichteten Bördelprozeß schwenkt der Wulst in eine 90°-Lage zur Waagerechten.Because the bulb-side bead of the bellows is formed at 45 ° to the horizontal ao, that there are no undercuts on the vulcanization mold or on the product itself, there are no molding and molding difficulties. The bead is thus so dimensionally stable that a rolling piston can then be flanged with it.
Bead formations with sealing surface inclinations between 45 ° and 65 ° have proven to be particularly advantageous. Due to the inward flaring process, the bead swings into a 90 ° position to the horizontal.

Die Durchmasserverringerung im unteren Rollbalg-Bereich ist lediglich zur Begünstigung der Ausbildung der Rollfalte beim Betrieb des Luftfederbalgs notwendig. Dabei sind der Durchmesser des Wulstkerns und der Durchmesser der Kolbenwand aufeinander abgestimmt.The reduction in diameter in the lower area of the bellows is only to favor the formation of the roll fold necessary when operating the air bellows. Here are the Diameter of the bead core and the diameter of the Piston wall coordinated.

Anhand der Abbildungen wird die erfindungsgemäße Rollbalg-Luftfeder näher beschrieben. Es zeigt:

  • Fig. 1 einen Längsschnitt durch eine erfindungsgemäße Rollbalg-Luftfeder;
  • Fig. 2a einen Rollbalg, einseitig, im Längsschnitt;
  • Fig. 2b das kolbenseitige Ende des Rollbalgs, ebenfalls einseitig, im Längsschnitt;
  • Fig. 2c das kolbenseitige Ende des Rollbalgs nebst Bördelkante des Abrollkolbens, einseitig, im Längsschnitt;
  • Fig. 3 einen zur Befestigung des erfindungsgemäßen Rollbalgs geeigneten Abrollkolben, im Längsschnitt;
  • Fig. 4 das kolbenseitige Ende eines Rollbalgs gemäß Gbm 298 08 109 U1.
    • The bellows air spring according to the invention is described in more detail with the aid of the figures. It shows:
  • 1 shows a longitudinal section through a bellows air spring according to the invention.
  • 2a shows a bellows, on one side, in longitudinal section;
  • 2b shows the piston-side end of the roller bellows, also on one side, in longitudinal section;
  • 2c the piston-side end of the rolling bellows together with the flanged edge of the rolling piston, on one side, in longitudinal section;
  • 3 shows a rolling piston suitable for fastening the rolling bellows according to the invention, in longitudinal section;
  • 4 the piston-side end of a roller bellows according to GBM 298 08 109 U1.

    • Die in der Fig. 1 dargestellte Rollbalg-Luftfeder 2 besteht im wesentlichen aus einem flexiblen Rollbalg 4 aus Gummi oder gummiähnlichem Kunststoff, einer Abdeckplatte 6 und einem Abrollkolben 8. An seinen beiden Enden ist der Rollbalg 4 jeweils mit einem Wulst 10, 12 versehen. Der "obere" Wulst 10 ist durch Bördeln mit der Abdeckplatte (Bördelplatte) 6 verbunden, während der kolbenseitige Wulst 12 an einer Bördelkante 30 des Abrollkolbens 8 befestigt ist. Der von Abdeckplatte 6 und Abrollkolben 8 begrenzte Rollbalg umschließt den Luftfederinnenraum 28.The bellows air spring 2 shown in FIG. 1 exists essentially from a flexible rubber bellows 4 or rubber-like plastic, a cover plate 6 and a rolling piston 8. At both ends is the Roll bellows 4 each provided with a bead 10, 12. The "Upper" bead 10 is by crimping with the cover plate (Flare plate) 6 connected during the bulb-side bead 12 attached to a flanged edge 30 of the rolling piston 8 is. The limited by cover plate 6 and 8 rolling piston Bellows encloses the air spring interior 28.

    Wesentliche Einzelheiten der erfindungsgemäßen Rollbalg-Luftfeder sind in den Fig. 2a - c dargestellt. Der in Fig. 2a einseitig im Längsschnitt abgebildete Rollbalg 4 weist an seinen beiden Enden wulstförmige Verdickungen auf. Der obere Wulst 10 ist in herkömmlicher Weise ausgebildet und dient zur Befestigung des Rollbalgs 4 an der Abdeckplatte (Bördelplatte) 6. Der untere, zur Befestigung am Abrollkolben 8 vorgesehene Rollbalg-Wulstrand 12 ist erfindungsindividuell an den Bördelrand 30 des oben offenen Abrollkolbene 8 angepaßt. Der in Fig. 3 dargestellte Kolben 8 gibt einen zylindrischen Kolbenrand 30 wieder. Dies ist der Zustand vor dem Bördeln des Wulstes 12.Essential details of the bellows air spring according to the invention are shown in Figs. 2a-c. The in Fig. 2a has bellows 4 shown on one side in longitudinal section bulges at both ends. The upper bead 10 is formed in a conventional manner and is used to attach the bellows 4 to the cover plate (Flaring plate) 6. The lower one, for attachment to the Roll piston 8 provided roll bellows bead 12 is invention-specific to the flange 30 of the open top Rolling piston 8 adapted. The piston shown in Fig. 3 8 shows a cylindrical piston rim 30. This is the condition before beading 12.

    Zur Vereinfachung der Rollbalg-Herstellung ist die Geometrie der Rollbalgoberfläche und der dazu korrespondierenden Herstellungsform reliefartig so ausgestaltet, daß auf einen Hinterschnitt weitgehend verzichtet werden kann. Die weitgehende Vermeidung eines Hinterschnitts erleichtert die Entformung.To simplify the production of rolling bellows, the Geometry of the surface of the bellows and that corresponding production form in relief designed that largely on an undercut can be dispensed with. The extensive avoidance of a Undercuts facilitate demolding.

    Die Anbringung des Rollbalgs 4 an dem Abrollkolben 8 soll sowohl mechanisch fest als auch pneumatisch dicht sein. Zu diesem Zweck weist die wulstförmige Verdickung des kolbenseitigen Rollbalg-Endes eine Dichtfläche 14 auf. Diese Dichtfläche 14 ist bei senkrecht stehendem Rollbalg 4 nicht waagerecht sondern ist um einen Winkel α zu der auf der Balgachse 16 stehenden Senkrechten 18 gekippt. In der Abbildung ist dieser Winkel α = 45° Er kann aber auch einen größeren Wert annehmen. Sowohl im Hinblick auf den Entformungsvorgang des herzustellenden Rollbalgs 4 als auch zur Anbringung des Wulstes 12 an dem Bördelrand 30 des Kolbens 8 haben sich Winkel zwischen 45° und 65° als besonders gut geeignet erwiesen.
    Zur-Verstärkung weist der kolbenseitige Wulst 12 einen Wulstkern (Ringkörper) 24 aus Stahl oder Stahldraht auf.    The attachment of the rolling bellows 4 to the rolling piston 8 should be mechanically firm as well as pneumatically tight. For this purpose, the bead-shaped thickening of the end of the roll bellows has a sealing surface 14. When the bellows 4 is vertical, this sealing surface 14 is not horizontal but is tilted by an angle α to the vertical 18 standing on the bellows axis 16. In the illustration, this angle is α = 45 °. However, it can also have a larger value. Angles between 45 ° and 65 ° have proven to be particularly suitable both with regard to the demolding process of the rolling bellows 4 to be produced and for attaching the bead 12 to the flanged edge 30 of the piston 8.
    For reinforcement, the bulb-side bead 12 has a bead core (ring body) 24 made of steel or steel wire.

    Der Durchmesser 22 des Wulstes 12 ist im Kolbenbereich auf den Durchmesser 26 der Kolbenwand abgestimmt. Dabei hakt der Wulst 12 des Rollbalgs 4 nicht in einen vorgebördelten Kolbenrand 30 ein. Wie aus der Fig. 3 ersichtlich, ist der Kolbenrand 30 nicht vorgebördelt. Der Rand 30 ist zunächst zylindrisch ausgebildet; er schließt sich erst durch den Bördelvorgang um den Wulst 12 des Balges 4. Am Ende des Bördelvorganges ist der Wulst 12 vom gebördelten Rand 30 des Abrollkolbens 8 fest umschlossen, wobei die kolbenseitige Dichtfläche 14 des Rollbalgs 4 auf 90°, bezogen auf die "Waagerechte", gedreht wird und so ganzflächig am oberen Ende der Kolbenwand anliegt (Fig. 2c). D. h.: Der Kolbenrand 30 wird insgesamt um ca 270° nach innen umgelenkt.
    Dieser Bördelvorgang erfolgt mit einem speziellen Werkzeug.    The diameter 22 of the bead 12 in the piston area is matched to the diameter 26 of the piston wall. The bead 12 of the rolling bellows 4 does not hook into a pre-flanged piston rim 30. As can be seen from FIG. 3, the piston rim 30 is not pre-flanged. The edge 30 is initially cylindrical; it closes only by the flaring process around the bead 12 of the bellows 4. At the end of the flanging process, the bead 12 is tightly enclosed by the flanged edge 30 of the rolling piston 8, the piston-side sealing surface 14 of the rolling bellows 4 being at 90 °, based on the "horizontal ", is rotated so that it rests over the entire surface at the upper end of the piston wall (FIG. 2c). In other words, the piston rim 30 is deflected inwards by a total of approximately 270 °.
    This flanging process is carried out with a special tool.

    Zur Verbesserung des Abrollvorganges des Rollbalgs 4 auf der Außenfläche des Abrollkolbens 8 ist der Durchmesser 22 des Rollbalgs 4 im Wulstbereich geringer als der sonstige Rollbalgdurchmesser 20.To improve the rolling process of the bellows 4 the outer surface of the rolling piston 8 is the diameter 22 of the bellows 4 in the bead area less than the other Bellows diameter 20.

    Soll ein Stoßdämpfer in die Luftfeder 2 integriert werden, so kann er als separates Teil in den offenen Kolben 8 eingebaut werden. If a shock absorber is to be integrated in the air spring 2, so it can be a separate part in the open piston 8th to be built in.

    BezugszeichenlisteReference list

    22nd
    Rollbalg-LuftfederBellows air spring
    44th
    Rollbalg, BalgRoll bellows, bellows
    66
    Abdeckplatte (Bördelplatte)Cover plate (flare plate)
    88th
    AbrollkolbenRolling piston
    1010th
    oberer Wulst(rand)upper bead (edge)
    1212th
    kolbenseitiger Wulst(rand)bulb-side bead (edge)
    1414
    kolbenseitige Dichtflächepiston-side sealing surface
    1616
    BalgachseBellow axis
    1818th
    Senkrechte zur BalgachsePerpendicular to the bellows axis
    2020th
    Rollbalg-DurchmesserBellows diameter
    2222
    Durchmesser des Wulstes im KolbenbereichBead diameter in the piston area
    2424th
    Wulstkern (Ringkörper)Bead core (ring body)
    2626
    Durchmesser der KolbenwandPiston wall diameter
    2828
    Luftfeder-InnenraumAir spring interior
    3030th
    Bördelrand, Bördelkante, KolbenrandFlanged edge, flanged edge, piston rim

    Claims (5)

    Rollbalg-Luftfeder (2), die im wesentlichen aus: einem flexiblen Rollbalg (4), einer Abdeckplatte (Bördelplatte 6) und einem Abrollkolben (8) besteht, wobei der Rollbalg (4) an seinem, dem Abrollkolben (8) zugewandten Ende einen Wulst (12) aufweist,
    dadurch gekennzeichnet,     daß der kolbenseitige Wulst (12) des Rollbalgs (4) ausvulkanisiert derartig angeformt ist, daß seine Dichtfläche (14) nicht waagerecht liegt sondern gekippt unter einem Winkel α zu der auf der Balgachse (18) stehenden Senkrechten (18) ausgerichtet ist.     Bellows air spring (2), which essentially consist of: a flexible bellows (4), a cover plate (flare plate 6) and a rolling piston (8), the bellows (4) having a bead (12) on its end facing the rolling piston (8),
    characterized,     that the bulb-side bead (12) of the roller bellows (4) is vulcanized in such a way that that its sealing surface (14) is not horizontal but is tilted at an angle α to the vertical (18) standing on the bellows axis (18).     Rollbalg-Luftfeder nach Anspruch 1,
    dadurch gekennzeichnet, daß der Winkel α, um den der kolbenseitige Wulst (12) zu der auf der Balgachse (16) stehenden Senkrechten (18) gekippt ist, in einem Winkelbereich von 45° bis 65° liegt.     Bellows air spring according to claim 1,
    characterized, that the angle α, by which the bulb-side bead (12) is tilted relative to the vertical (18) standing on the bellows axis (16), lies in an angular range from 45 ° to 65 °.     Rollbalg-Luftfeder nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, daß der Rollbalg (4) an seinem dem Abrollkolben (8) zugewandten Ende einen von dem sonstigen Rollbalg-Durchmesser (20) geringeren Durchmesser (22) aufweist.     Bellows air spring according to claim 1 or 2,
    characterized, that the bellows (4) has at its end facing the rolling piston (8) a smaller diameter than the other bellows diameter (20) (22).     Rollbalg-Luftfeder nach einem der Ansprüche 1 bis 3,
    dadurch gekennzeichnet, daß der Wulst (12) einen starren Wulstkern (Ringkörper 24) aufweist,
    wobei der Durchmesser (22) des Wulstkerns (24) und der Durchmesser (26) der Kolbenwand aufeinander abgestimmt sind.         Bellows air spring according to one of claims 1 to 3,
    characterized, that the bead (12) has a rigid bead core (ring body 24),
    the diameter (22) of the bead core (24) and the diameter (26) of the piston wall being matched to one another.     Verfahren zur Herstellung einer Rollbalg-Luftfeder gemäß einem der Ansprüche 1 bis 4,
    dadurch gekennzeichnet, daß zunächst die Dichtfläche (14) des kolbenseitigen Rollbalg-Wulstes (12) unter einem Winkel von 45° - 65° zu der auf der Balgachse (16) stehenden Senkrechten (18) formstabil so hergestellt wird, daß sich am kolbenseitigen Wulst (12) keine Hinterschneidung - weder an der Vulkanisationsform noch am Rollbalg (4) selbst bildet, und daß dann der Abrollkolben (8) mit dem so hergestellten Rollbalg (4) in der Weise gebördelt wird, daß der kolbenseitige Wulst (12) beim abgeschlossenen Bördelvorgang in einer 90°-Lage zur Senkrechten (18) der Balgachse (16) zu liegen kommt.     Method for producing a bellows air spring according to one of claims 1 to 4,
    characterized, that first the sealing surface (14) of the piston-side roll bellows bead (12) is produced in a dimensionally stable manner at an angle of 45 ° -65 ° to the vertical (18) standing on the bellows axis (16), that there is no undercut on the bulb-side bead (12) - neither on the vulcanization mold nor on the rolling bellows (4) itself, and that the rolling piston (8) with the roll bellows (4) thus produced is flanged in such a way that the bulb-side bead (12) comes to rest in a 90 ° position to the vertical (18) of the bellows axis (16) when the flanging process is completed.
    EP00110758A 1999-06-01 2000-05-19 Rolling-lobe air spring Expired - Lifetime EP1058026B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19925092A DE19925092C2 (en) 1999-06-01 1999-06-01 Bellows air suspension
    DE19925092 1999-06-01

    Publications (3)

    Publication Number Publication Date
    EP1058026A2 true EP1058026A2 (en) 2000-12-06
    EP1058026A3 EP1058026A3 (en) 2003-04-16
    EP1058026B1 EP1058026B1 (en) 2004-11-17

    Family

    ID=7909885

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00110758A Expired - Lifetime EP1058026B1 (en) 1999-06-01 2000-05-19 Rolling-lobe air spring

    Country Status (6)

    Country Link
    US (1) US6412758B1 (en)
    EP (1) EP1058026B1 (en)
    JP (1) JP4519994B2 (en)
    AT (1) ATE282780T1 (en)
    DE (2) DE19925092C2 (en)
    HU (1) HU224445B1 (en)

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    WO2007025771A1 (en) * 2005-09-02 2007-03-08 Saf-Holland Gmbh Pneumatic suspension bellow
    WO2014036316A1 (en) * 2012-08-29 2014-03-06 Firestone Industrial Products Company, Llc End members and gas spring assemblies including same

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    DE10135063B4 (en) * 2001-07-18 2005-07-14 Progress-Werk Oberkirch Ag Air spring pot and method for producing the same
    DE10212898B4 (en) * 2002-03-22 2004-03-04 GKN Löbro GmbH Rolling bellows and rolling bellows arrangement
    US7322567B2 (en) * 2004-05-20 2008-01-29 Arvinmeritor Technology, Llc Air spring assembly
    US20060208403A1 (en) * 2005-03-16 2006-09-21 Arvinmeritor Technology, Llc Air spring assembly with flexible can
    MX2012004403A (en) * 2009-10-14 2012-05-08 Firestone Ind Products Co Llc End member, gas spring assembly and method.
    BR112013005318B1 (en) 2010-09-10 2021-05-11 Hendrickson Usa, L.L.C. air spring
    US9139061B2 (en) 2013-04-03 2015-09-22 Watson & Chalin Manufacturing, Inc. Vehicle suspension system with reservoir for air spring damping

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    Cited By (6)

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    US9556922B2 (en) 2012-08-29 2017-01-31 Firestone Industrial Products Company, Llc End members and gas spring assemblies including same

    Also Published As

    Publication number Publication date
    HU0002086D0 (en) 2000-08-28
    HU224445B1 (en) 2005-09-28
    EP1058026A3 (en) 2003-04-16
    JP4519994B2 (en) 2010-08-04
    DE19925092C2 (en) 2003-04-10
    JP2001012526A (en) 2001-01-16
    DE19925092A1 (en) 2001-01-11
    HUP0002086A2 (en) 2001-04-28
    ATE282780T1 (en) 2004-12-15
    EP1058026B1 (en) 2004-11-17
    US6412758B1 (en) 2002-07-02
    HUP0002086A3 (en) 2003-08-28
    DE50008641D1 (en) 2004-12-23

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